hadoop-yarn-issues mailing list archives

[jira] [Commented] (YARN-365) Each NM heartbeat should not generate and event for the Scheduler

Date

Wed, 06 Feb 2013 22:05:13 GMT

[ https://issues.apache.org/jira/browse/YARN-365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13572893#comment-13572893
]
Thomas Graves commented on YARN-365:
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So I'm not sure that this is gaining us anything. The scheduler still has the same amount
of work to do. Its either doing it one at a time via multiple events or with these changes
all at once but processing the same number in the list of things stored in the RMNode. I can
see cases where the all at once is actually worse as it will spend more time on a single heartbeat
and potentially not get to other things in the queue like apps added as fast.
The only way I can see this being beneficial is if we can aggregate the heartbeats and have
the scheduler process less.
> Each NM heartbeat should not generate and event for the Scheduler
> -----------------------------------------------------------------
>
> Key: YARN-365
> URL: https://issues.apache.org/jira/browse/YARN-365
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager, scheduler
> Affects Versions: 0.23.5
> Reporter: Siddharth Seth
> Assignee: Xuan Gong
> Attachments: Prototype2.txt, Prototype3.txt, YARN-365.1.patch, YARN-365.2.patch,
YARN-365.3.patch
>
>
> Follow up from YARN-275
> https://issues.apache.org/jira/secure/attachment/12567075/Prototype.txt
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